key = "adsfkndcls"
match = "killshadow"
flag = ""
ss = [chr(j) for j in range(65, 91)] + [chr(i) for i in range(97, 123)]

for i in range(len(key)):
    for s in ss:
        f = 0
        if (ord(s) - 39 - ord(key[i]) + 97) % 26 + 97 == ord(match[i]):
            flag += s
            f = 1
        if f == 1:
            break
print(flag)
